Spring-board attachment for felling trees.



No. 766,394. PATENTED AUG. 2, 1904.

' G. W. SCHILLING.

SPRING BOARD ATTACHMENT FOR PELLING TREES.

APPLICATION FILED 1330.10, 1903.

N0 MODEL.

WITNESSES IN VENTOR ATTORNEY UNITED STATES Patented August 2, 1904.

PATENT OEEIcE.

CHARLES 'ILLIAM SOIIILLING, OF PORTLAND, OREGON.

SPECIFICATION forming part of Letters Patent No. 766,394, dated August 2, 1904.

Application filed December 10, 1903. Serial No. 184,689. (No model.)

To all whmn it may concern.-

Be it known that I, OHARLEs lVILLIAH SCHIL- LING, a citizen of the United States. and aresident of Portland, county of Multnomah, and State of Oregon, have invented a new and useful Spring- Board Attachment for Felling Trees, of which the following is a specification, reference being had to the accompanying drawings as constituting a part thereof.

Hy invention has for its object to obtain some effective yet inexpensive means for affixing what is known as a spring-board to a tree, being a sort of platform on which the lumberman stands while cutting down the tree.

My invention further has for its object to make the spring-board adjustable, so that the same may be readily propped up if the outer end thereof sags too much and also to allow the spring-board to be arranged at any convenient angle in a horizontal plane.

I obtain my object by the device illustrated in the drawings above referred to.

In such drawings, Figure l is a side elevation of my device, partly in section. Fig. 2 is a front end elevation of my device with the spring-board removed. Fig. 3 is a plan or top view of my invention as shown in Fig. 1, excepting that the shaft (I has been given a tlLltll'bGF-blllll, so as to project the ends of the blades (l, as done in practice.

Referring now to the letters as designating the parts described, my attachment consists of a plate B, the head end 6 of which is bent at an angle. integrally made with the plateB is a wedge-shaped driving-head 0, having a central portion (1 cut out. In the opening so provided is journaled a shaft (7, made with a series of knife-edge blades (1'. Said knife-edge blades are of the same width as the thickness of the wedge-head 0. so that when said blades are positioned vertically, as shown in Fig. 1, their lateral edges will not protrude beyond the sidefaces of said wedge-head. This construction is obviously necessaryto enable the wedge-head e to be driven into the tree without injury to said blades (Z.

The shaft (Z is journaled by its ends (Z (Z3 in said wedge-head and the plate B. To hold the shaft in place, the edge of the journalhole on the inner face b of the plate B is slightly chamfered, and after the shaft (Z has been inserted the edge of the shoulder fl is slightly upset or flared out. The projecting end if of the shaft (7 is provided with a hole a, in which to insert a bar wherewith to give said shaft a quarter-turn.

To adapt my device to withstand the blows of the sledge in driving the wedge-head a into the tree, the shaft end is protected by a hammer-head f, and the latter is held in place by the turn-bar inserted in the hole a.

The spring-board a is removably secured to the head end 7) of the plate B by a plate 7. The latter is made with holes through which to receive rods h It and with a slot in which to receive the hook-headed pin j. The head end 7/ of the plate B is made in the form of an arc, and in the periphery thereof are made a series of notches and the plate g has a rigid downward-prejecting stud-pin on, which construction allows the spring-board to be supported at any convenient angle in horizontal plane. To the lower end of the plate B is hingedly attached a rod 0, having a threaded end. The lower end of the bolt /r is provided with a hinged brace-bar Z, the lower end Z of which is bent at an angle and constitutes a pin adapted to be inserted in a hole thereforprovided in the bracket 11. Said bracket is also provided with a wedge-head n, adapted to be driven into the tree, and it is further made with a thread-hole in which to receive the threaded end of the rod (1. The means described for supporting the spring-board are substantially and cheaply made and are adapted to allow the adjustment of the spring-board as required.

In the practical use of my invention the wedge-head 0 is first driven into the tree. The shaft (1 is then rotated by means of the turn-bar p to cause the blades (Z to out laterally into the tree for the purpose of securing the wedge-head in place, the blades ('Z serving this purpose the same as the threads of a screw. The wedge-head /1 is next driven into the tree, and thereafter the spring-board is fastened on the hook-headed pin j, and to support the outer end of the spring-board the lower end of the brace-bar Z; is inserted in the bracket n. Should the end of the springboard sag too much, the brace-bar k is again disengaged and the wedge-head n extracted. The bracket 01, is thereupon slightly raised by turning up on the threaded end of the rod 0, after which the wedge-head n is again driven into the tree and the brace-bar 7c readjusted in position. The joint (1 facilitates the adjustment--21 a, the raising or lowering of the brackets 91 for the purpose describedwithout removing the wedge-head 0. Were the rod 0 to be an integral rigid part of the plate B, it is self-evident that the extraction of the wedge-head a would exert such a leverage as to at least partly extract the wedgehead 5 at the same time. When it is desired to extract the wedge head 0, the same is readily done by first turning the shaft (Z back, so as to bring the blades (Z again into their vertical position.

Having fully described my invention, what I claim, and desire to secure by Letters Patent, is

1. In aspring-boardattachment, the com bination of a supporting-frame, a wedge-head on said supporting-frame, for fastening the same to a tree, and means for securing said wedge-head in place, after having been driven into the tree, consisting of a rotatable shaft, longitudinally journaled in an opening therefor provided in said wedge-head, and integral blades on said shaft,adapted to be entirely contained within the wedge-head, and also to be laterally projected by rotating said shaft, substantially as described.

2. In a spring-board attachment, the combi' nation of a supporting-frame, a wedge-head on-said supporting-frame for fastening the same to a tree; means for securing said wedgehead in place, after having been driven into.

the tree, consisting of a rotatable shaft, longitudinally journaled in an opening therefor provided in said wedge-head, and integral blades on said shaft adapted to be entirely contained within the wedge-head, and also to be laterally projected by rotating said shaft; a rod hingedly attached to the lower end of said supporting-frame; a bracket adjustably secured on the lower end of said rod; a wedgehead on said bracket, for also fastening the same to the tree; means for removably supporting the inner end of the spring-board, on said supporting-frame; and a support, resting on said bracket, supporting the outer end of said spring-board, substantially as described.

.3. In a spring-board attachment, the combination comprising a supporting-plate B, made with a segment-head 7); means for affixing said supporting-plate to a tree; a hinge-pin j on the segment-head b; a rod hingedly attached to the lower end of said plate B; a bracket adjustably secured on the lower end of said rod; means for affixing said bracket to a tree; a spring-board, a plate 9, attached to the inner end thereof, and provided with a slot adapted to be inserted on said hinge-pin j; a hinged brace-bar k, the lower end of which is supported on'said bracket, and means for securing the plate 9, and the spring-board, in convenient radial position, on the segment-head b, substantially as described.

4. A spring-board attachment comprising a supporting-plate B; made with a segm ent-head I); a hinge-pin j, on said segment-head, a wedge-head on said plate B, for fastening the same to a tree; means for securing said wedgehead in place, after having been driven into the tree, consisting of a rotatable shaft (Z, longitudinally journaled in an opening therefor provided in said wedge-head, and integral blades on said shaft, adapted to be entirely contained within the wedge-head, and also to be laterally projected by-rotating said shaft; a rod hingedly attached to the lower end of said plate B; a bracket adjustably secured on the lower end of said rod; means for afiixing said bracket to a tree; a spring-board, a plate 9, attached to the inner end thereof, and provided with a slot adapted to be inserted on said hinge-pin j; a hinged brace-bar is, the lower end of which is supported on said bracket, and means for securing the plate g, and the spring-board in convenient radial position on the segment-head b; substantially as described.

5. A spring-board attachment comprising a supporting-plate B, made with a segment-head 6, having peripheral notches; a hinge-pin j, on said segment-head; a wedge-head on said plate B, for fastening the same to a tree; means for securing said wedge-head in place, after having been driven intothe tree, consisting of a rotatable shaft (Z, longitudinally journaled in an opening therefor provided in said wedge-head, and integral blades on said shaft, adapted to be entirely contained within the wedge-head, and also to be laterally projected by rotating said shaft; a rod hingedly attached to the lower end of said plate B; a bracket adjustably secured on the lower end of said rod; means for afiixing said bracket to a tree; a spring-board, a plate g, attached to the inner end thereof, and provided with a slot adapted to be inserted on said hinge-pin j, a hinged brace-bar 7c, the lower end of which is supported on said bracket; and a pin m, on the under side of the plate g, adapted to be inserted in the peripheral notches e, for locking said plate and the spring-board, in convenient radial position on the segment-head b, substantially as described.

In testimony whereof I have hereunto affixed my signature .in the presence of two witnesses.

CHARLES WILLIAM SCHILLING.

Witnesses:

T. J. GEIsLER, ARTHUR LANZ.

IIO 

